关键词: 超支化聚(酯-胺), 二丙烯酸酯, 1-(2-胺乙基)哌嗪, 哌嗪, 分子设计

Abstract: Water-soluble hyperbranched copoly(ester-amine)s with various degree of branching (DB) were prepared via the "A₂+B₂+BB′₂" approach. Due to the faster reaction between Aand Bfunctional groups, the intermediate containing one Agroup and two B′ groups was generated in situ. Further self-polyaddition of the AB′₂ intermediate gave hyperbranched polymer. In this communication, A₂ is ethylene diacrylate (EDA), B₂ is piperazine (PZ), and BB′₂ is 1-(2-aminoethyl)piperazine (AP). The combination of mass spectrum and in situ FTIRdetermined the reaction mechanism and propagating paths predicted. DBof the resulting branched poly(ester-amine)s decreases with increasing the feed ratio of PZ to AP. In the same molecular weight, the inherent viscosity of the polymers presented here increases with decreasing DB. The simplicity of the reaction process, the controllability of the architecture, and the commercially availability of the raw materials would make this approach attractive in the large scale manufacture and application of hyperbranched polymer materials.

Key words: Hyperbranched copoly(ester-amine), Ethylene diacrylate, 1-(2-Aminoethyl)piperazine, Piperazine, Molecule-design